June 30
1879: The
California Electric Light Company was organized in San Francisco,
becoming the first electric company formed to produce and sell electricity 1905:
Albert Einstein published his theory on
special relativity, "On the Electrodynamics of Moving Bodies."
1908: An
unexplained explosion in Tunguska, Siberia knocked down trees
in a 40-mile radius and knocked people unconscious 40 miles away.
1918: Francis Stanley, famous for his
Stanley
Steamer automobile, died. 1930: The first round-the-world broadcast
from the U.S. used a series of short-wave radio relays and took
one-eighth of a second. 1946: The first
atomic bomb dropped from an airplane over water occurred over
the Bikini Atoll onto a target group of 73 scrapped ships. 1948:
The invention of the
transistor
was announced by Bell Laboratory. 1948: The first telephone recording
devices were authorized for public use in the U.S., and required
a periodic "beep" to alert the users. 1953: The first
Corvette rolled off the Chevrolet assembly line (it sold for
$3,250). 1961:
Dr. Lee de
Forest, inventor of the Audion tube, died. 1971: Three cosmonauts
aboard
Soyuz 11 were found dead inside their spacecraft after it had
returned to Earth. 1972: The first leap second time correction was
added. 1997: China resumed sovereignty over
Hong Kong.
| Jan
| Feb | Mar |
Apr | May |
Jun | Jul |
Aug | Sep |
Oct | Nov |
Dec |
Note: These
historical tidbits have been collected from various sources, mostly on the Internet.
As detailed in
this article, there
is a lot of wrong information that is repeated hundreds of times because most websites
do not validate with authoritative sources. On RF Cafe, events with
hyperlinks have been verified. Many years ago,
I began commemorating the birthdays of notable people and events with
special RF Cafe logos.
Where available, I like to use images from postage stamps from the country where
the person or event occurred. Images used in the logos are often from open source websites
like Wikipedia, and are specifically credited with a hyperlink back to the source where
possible. Fair Use
laws permit small samples of copyrighted content.